Photography Tutorial: Evolution of K mount.

MORNING LIGHT from the M42 to the slotting tool the company's first four optical SLR born in 1951-1957. .They use screw mount (M37 × 1, diameter of 37mm, pitch 1mm). .This 4 camera achieved only limited success. .Then in 1957, a new screw mount is used to "Xuguang Pentax" camera, and is called the standard screw mount (often called M42 bayonet, because of its 42 <! - Content start - .> <hr size="1" /> from the M42 to the slotting tool Xuguang optical company's first four SLR born in 1951-1957. They use screw mount (M37 × .; a diameter of 37mm, pitch 1mm). This 4 camera with only limited success. So in 1957, a new screw mount to be used for "Xuguang Pentax" camera, and was called .a standard screw mount (often called M42 bayonet, because of its 42mm diameter, pitch is still 1mm). In 1961, Xuguang Pentax S3 camera available, the use of an improved standard screw mount over, you can .full aperture metering, to its credit, this new mount is fully backward compatible. 1975, when Pentax M42 aware of the shortcomings, the K bayonet knife inserted prototype debut, Later, based on the increase in the number of new .features, such as program exposure, auto focus, power zoom.... but does not sacrifice compatibility with the original model. Therefore, a K mount lenses, whether it is which type of K population, can card .any type of the body K mouth. PENATX the .K bayonet has a long history. This bayonet knife inserted in 1975 to replace the M42 (screw port), and still in use. It is a major cause of longevity, is the PENTAX adding new features, do .to the old and new technology is fully compatible. In addition to very few exceptions, all from the K bayonet PENATX 35mm since the birth of both general-purpose equipment. [Note: There are two body - lens compatibility exceptions: To reduce costs, PENTAX will be the most low-end of the MZ / ZX body design .as can only be used with the "A" file lenses (SMC-A, SMC-F and SMC-FA) and selected "A" stalls only correct metering. does not meet this requirement, then, MZ-50 / .ZX-50 will occur due to exposure, and MZ-30/ZX-30 is completely not work.] in the K bayonet to add new features, always lead to new product lines / rename the new series, with K mount longevity, resulting in a number of names on the .confusion. What's more, with other companies, PENTAX also in different countries use different numbers to offering the same products. The most obvious example is the MZ / ZX and Z / PZ fuselage. as: MZ-5n body with the ZX- .5n is the same model, Z-50 and PZ-50 is the same model. ZX and the PZ number of aircraft, in the U.S. market for sale, warranty, MZ, and Z body is used in other markets. to use the exact reason for the double number is still not .conceivable, but presumably there are some of the following: Some names in a language has a pejorative connotation; a name in some languages is even more pleasant; easy to distinguish between different numbers of parallel imports; different numbers to facilitate the customs tax. </ .p> in the following paragraphs, lists all the types of K .mount and supporting the lens body (according to the functions in the order from low to high). Unless otherwise stated, each of which features the former category have a bayonet with the functions described in this category. < .p style = "MARGIN-TOP: 0px; MARGIN-BOTTOM: 10px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%" align = "left"> manual focus mount K bayonet (non-auto iris) </ .em> Body: (not shown) . Lens: Anti-fold: SMC 1000 mm f / .11, SMC 2000 mm f/13.5, SMC-M 2000 mm f/13.5, SMC 400-600 mm f/8-f/12; non-auto iris: SMC 28 mm f/3.5 Shift, SMC 85 mm f/2.2 Soft ., SMC 400 mm f/5.6, SMC 500 mm f/4.5, SMC 1000 mm f / 8, SMC 135-600 mm f/6.7 This mount enables quick integration and alignment of the lens in precise angles. discount reflecting mirror (Mirror lenses) there is no aperture blades, so only a fixed aperture, the most immediate consequence is that he only .can be achieved manually (M) and aperture priority (AV) mode. Non-Automatic Iris Lens (Manual diaphragm lenses) of the aperture blades always stay in the set position by the aperture ring, therefore, can only shrink the aperture metering. Thus, framing, composition and focus needs full aperture .to, and metering, depth of field and exposure forecast, but also shrink the aperture. The camera lens is not the first group of rotation, so the focus will not affect the use of polarized light microscopy. K bayonet (auto iris): body: K-Series, M-Series, LX Lens: All the above are not listed in SMC and SMC-M lens one installed in the camera body will remain in the auto iris lens at maximum aperture, .regardless of what position the aperture ring set, just in the moment of exposure, was the body-driven, (automatic) contraction of the aperture. This way of working to bring the convenience of shooting, but the predicted depth of field devices that require additional special (only .in the body to provide high). SMC and SMC .-M lenses is the difference between the latter is smaller and more lightly. However, there are some SMC lens, not through the optical structural changes to be re-named to give SMC-M. < .p style = "MARGIN-TOP: 0px; MARGIN-BOTTOM: 10px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%" align = "left"> KA mount: . Body: A series, P series Lens: SMC-A All of this mount lenses, the aperture ring has a digital file (such as the K-mount lenses .) and an "A" file. When the digital file is selected, SMC-A lens like an auto iris, like K-mount lenses; and when selected "A" file, the fuselage is completely in control of the lens .aperture, so that the shutter priority (Tv) and procedures (P) mode can be achieved. KA2 mount body: MZ-M, ZX-M Lens: Not listed PENTAX KA and did not fully explain the difference between KA2 mount, but the ZX-M simply the taste, we know it is basically removed the auto-focus drive rod KAF2 mount (see below). ZX .-M/MZ-M can read F-or FA-series lens aperture and focal length. aperture value is displayed in the viewfinder, even if the lens is not "A" files also do so. focal length used to determine the value of the minimum hand speed, .flash sync speed and the angle used to determine the adequacy of flash coverage angle lens. AF mount KF mount: K bayonet (Auto Aperture) extension body: ME-F Lens: AF35-70f/2.8 This is the first put the consumer market is one AF SLR. which is characterized by AF and the AF detector circuit in the apparatus, and were placed in the AF motor inside the lens. This approach was soon .that is not enough, and eventually abandoned the economy, the technology is cheaper (all AF components are placed inside the fuselage) to replace. Therefore, ME-F and AF35-70f/2.8 be used only with the AF function. But ., the use of all K-series lenses, ME-F can provide instruction in focus. KAF bayonet: KA mount extension body: SF-series, MZ-7/ZX-7, MZ-50/ZX-50 Lens: SMC-F AF detectors, motors, control circuits are placed inside the body, the body of a switch to cancel the auto-focus, manual focus .. This sounds very attractive, but you know, AF lenses are manual focus feel bad. because in order to meet the low power, small and light the AF motor, AF lenses are used on a more loose .focus ring bodies. body and lens design .makes such a card I can pass the lens focal length (in terms of the zoom lens is the focal length of the currently selected) and the focus distance information. The data is primarily used to improve the flash control to make it more easy and effective. the first group of many of these camera lens is rotating, in the .using polarized light microscopy and gradient lens will cause some trouble. PANTAX of AF with MF lens body to provide the so-called focus lock function (Note: the "trap focus"). The implication is that when you press the shutter does not release the shutter exposure, until the body .The detector detects AF in focus so far. in focus can be achieved because of the lens re-focus, but also by changing the camera and the distance between the subject reached. KAF2 mount: (manual zoom) body: not listed Lens: SMC-FA (manual zoom) such a lens MTF can pass information to the body in order to achieve image quality priority exposure modes. KAF2 mount (power zoom) body: Z-Series, PZ-series, MZ-series, ZX .- Series (KAF card in KA2 and models listed except the mouth).

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Wednesday, January 5, 2011

Evolution of K mount.

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